161005008 has 40 divisors (see below), whose sum is σ = 416386048. Its totient is φ = 53609472.

The previous prime is 161005007. The next prime is 161005049. The reversal of 161005008 is 800500161.

161005008 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161005008² = 51845225202160128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161005001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78816 + ... + 80832.

Almost surely, 2^161005008 is an apocalyptic number.

It is an amenable number.

161005008 is an abundant number, since it is smaller than the sum of its proper divisors (255381040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161005008 is a wasteful number, since it uses less digits than its factorization.

161005008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691 (or 3685 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 161005008 is about 12688.7748817607. The cubic root of 161005008 is about 544.0178230896.

Adding to 161005008 its reverse (800500161), we get a palindrome (961505169).

The spelling of 161005008 in words is "one hundred sixty-one million, five thousand, eight".